Furnace-grate.



APAtrEN'rBD ooT.- 23,1906.- conm.

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FURNAGB GRATB'. -APPLIQATI0I FILED 00T. 8. 1005.

's sums-snm an nga.'

INVENTQ R's To all whom t may concern:

SMITH G. TIBs'JAMES A.'jcoEEnAND WILLIAM COREY, or. AKRON,y y'

OHIO.A

FunnAcE- c-in'ArE.

Be it known that we, SMITH G; Trans, JAMES A. COREY, and WILLIAM E.COREY, citizens of the United States, residin at Akron, in the c o'untyof Summitand tate of Ohio, have invented certainnew and;- 'usefulImprovements in Furnace-Grates; and we do declare that the following isa full, clear, and exact description ofthe invention, which will enableothers skilled in the artI to which it j ap ertains to make and use thesame.

g ur invention relates topim-provements in grates for furnaces andystoves; andthe 1mprovement lcons1sts 1n the construction and arrangementof" vparts adapted tov provide uniform firin and 'an equal distributionof heat within t e fire-pot, all substantially as' hereinafter shown,andmoreA particularly I pointed out in the claims.

Our object is embodied in a rotary grate and a centrallylocatedv membertherein adapted to ldis lace the coal withinthe centerpor-tion of t efire-` ot and whereby a uniform iire is obtained a out the entirecircular wall of the pot. f

In the accompanying drawings, Figure 1 is a central sectional elevationof our improved grate and its related parts as seen inv one formofstofve or furnace.4 Figgl2 is a cross-section on line xix, Fig. 1; andFig. 3 is a perspective view of the coal-displacement mem- It will beunderstood that ourV device is adapted for various forms of furnaces andstoves, only one form of which is shown. Thus the furnace comprises acasing or body A, provided with the usual'fire-pot B and ash-pit C .anddoors b and c, respectively,

therefor; Casing or body A ma be made 1n `one or more parts, but as heres` own has an ashpit section A', adapted to support firepot section BJ,the upper smoke-flue portion of which is broken away and not shown, as

` the same may be of any well-known type.

. Section A is provided with an inturned flange or projection a, uponwhichthe lower i j supporting-ring- 2 for gratemember 3 is 's'upported.Any 'other suitable support for rin 2 may be yemployed or the ring ma-be bolte directly to the wall of casing A. e ing 2 has a circular orendless race 4 for balls or rollers 5, upon which ate member 3 isadapted to 4 rest and where y ease and freedom of rotal tion for thegrate member is obtained. Ro.;

Specicationof Letters Patent. Application filed October 9, 1905. SerialNo. 281,910\.

' said shaft continuously(r vserve to break upthe 4ecljuivaletprojections or rammed oca-23,1906.

tation 4to memberB is impartedbyhpinion 6, .5"4 mounted on a short shaft7, having bearin in-boss 8 ofcasing A, which pinion meshes with a.circular-gear or rack 9, the-teeth@ ofl j which 'are preferably castintegral withmember 3.at its bottom and-edge. A suitable 6o vcrankehandle -en a ement is made with squared end 10- o s aft 7 toeither rotate 'or to rock the same, e movement to grate and therebyimpart li member 3. y' l I Grate member 3 comprises as i-ts main por.-tion a ring-likebody 1.2, having integral fingers o'r grateTbars 13radiat' therefrom to;v ward the centerjand terminatlng short there-v ofto provide a centralao 15. overlaps the. joint etween ring -2 -and body12 to exclude cinders and ashesrom point. l

I-Iavingxdesc'rbed-l the main. parts df the 8o grate, we now cometo theessential element Y which contributes the most tothe advantages andbenefits derived by our device and which comprises a hollow pillarmember D, of cone sha e, adapted to `rest upon the inner 8 5 ends or re'uced projections 184 of'grate-bars 13 and removab e' therefrom, butseated so closely thereon that it rotates with grate member y3. Shortlugs or interlocking'ex-4 tensions 20, such as shown lin Fig. 3, may be9ol provided at the bottom of pillar member D to engage between the endsofthe gratebars 13 and cause common rotation of said parts.

lPillar member D is preferably of such 2 heiglht as to bring its tolabout on a level -95 wit the bottom of the e-door b or ,to the levelofthe bed of-coal usually placed within pot B, and said top portion isrounded. and

as flari sides 21, widestl at its topland meeting t e contracted portion22 of the roo pillar just above its center between its ends. V A- seriesof spaced ribs 23, running axially of the pillar the fulllengthofil'aring sides .(21 coal at the top of the bed when grate3 and pillarD are rotated. :o5 These ribs Ymay be made shorter or longer, or

' ers ma be aced uponthe side of theline, althbugh ening 1fi. Aflange 7oi 'the formfshownis :deemed :besti .because the natural dro ping ofthecoal'toward the grate during com ustionis notI .im1`ieded,v .the ribsIOA meansheretofore described a ,being vertically. inclined with theirbottoni ends nea-rer tothe center of the pot than thetop. A series ofopenings 25 aboutV the conebody of the pillar communicates with its hol`low interior 2,6 and rovides for a supply of air for the bed 'of coalabove the grate-bars in order topromote better,combustion.v 1

Other air-openings ma be made higher up .form :and: shape off theopeningsmay. be .dif-

ferelitf from. that: shown. 4

Pillar member D. is particularly well. adaptl ed for any coal stove or.furnace such as are -in daily. use, and With its'use a certain amount ofcoal within the centerfof the firepot is displaced and saved.' The firebeing;

ber and against the Wall of the fire-pot,` the vcoirruelled to' follow.the rin Aof coal aboutthe center pillar or cone-disp acement rnemi heatgenerated is-concentrated at the sides of the pot, where it is mostdesired'for quickv radiation, and not in the center of therbed of'.

coal, as formerly.

With a stove of a I lven size using ourfdevice a great saving o fuel iseffected as compared .with one without, kand although the' quantity Ioffuel isxlessened` in use a greater heating effect is obtained thanheretofore.

Perfect combustion andthe disposition off thebed-of fuel and the mixithereof by the give; the advantages stated. v

Shaft 7 has a sprocket or gear wheel Fattached thereto .atthe...outside'of casing-boss 8r which is adapted to be operated by chainGor equivalent gear connection, which. chain may extend to any point for.distant manipulation of the grate. -For example, said ch'ain maybeyoperated from the upper floorof the lcontribute to dwellingif thefurnaceis'located in the basement.

l What we claim is- 1. In stoves and furnaces, a fire-pot taperl inginwardly and downwardly, a main grate .memberrotatable at the bottomthereof, a

hollow coal-displacing pillar supported `centrally up'on said grate andhaving inclined coal-breaking projections upon its sides near its.topsubstantially parallel to the taper'of` the fire-pot, said illarhaving an air-outlet at about its midd e portion.-

. 2.5111 stoves and furnaces,1 a rotatable grate, in` combination with ahollow upright member mounted thereon, said membenhaving. aplainupwardly-tapered body circular in cross-section with air-outlets atabdu.tits middle portion and an outwardly-Haring head withinwardly-inclined ribsfrom the 'top tothe bottom of said head, and alfire-pot hav-ing'its wall converging toward=the bot- `tomandsubstantially parallel to the edges of said ribs.

3. As an article of manufacture and sale, a

supplementalI grate member for stoves and furnaces adapted to displacethecenterpor WM. WELLS, J. I. BACHTEL.

5 tion ofthe bedof coal -within the stove or

